Fri, 04 Nov 2011 08:00:48 +0100 ex/Tree23.thy: simplify proof of bal_del0
huffman [Fri, 04 Nov 2011 08:00:48 +0100] rev 45335
ex/Tree23.thy: simplify proof of bal_del0
Fri, 04 Nov 2011 07:37:37 +0100 ex/Tree23.thy: simplify proof of bal_add0
huffman [Fri, 04 Nov 2011 07:37:37 +0100] rev 45334
ex/Tree23.thy: simplify proof of bal_add0
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